prometer

noun
  1. A person or entity that makes a promise or commitment to do something. noun
    The prometer assured the investors that the project would be completed on time.
    As a prometer of the event, she was responsible for ensuring everything ran smoothly.
  2. A device or tool used to measure or indicate the level of promotion or marketing effectiveness. noun
    The marketing team used a prometer to gauge the success of their latest campaign.
    By analyzing data from the prometer, they were able to adjust their strategies accordingly.